Underground flow paths in karst regions

The Underground flow paths layer indicates the probable direction taken by the groundwater in karst regions within the catchments towards the relevant spring. These interpretations are also based on the results of tracer tests to verify presumed flow patterns. The information in the categories Karst regions and Karst groundwater, respectively, is based on hydrogeological 3D models (KARSYS approach). It was developed, with the support of the cantons, by the Swiss Institute for Speleology and Karst Studies SISKA and is published by the Federal Office for the Environment FOEN.